When a patient coughs with sternal pain, it is important to find out if there are several causes: First, the patient has a heavy infection and coughs more violently, which causes shock to the sternum and thus triggers sternal pain. At this time, we should actively fight against viral or bacterial infections and use some powerful cough medicines. If necessary, morphine-based drugs can be used to stop the cough so as to avoid violent coughing. Second, whether the patient has underlying diseases, such as coronary artery disease or other heart diseases, which can trigger an attack of underlying diseases when coughing. Therefore, it is recommended to check the electrocardiogram at this time, except for any lesions in the important organs first. If sternal pain occurs, try to consult a cardiologist in time to treat the heart disease and avoid coughing to cover up more serious conditions. Third, when a patient has sternal pain and cough, it is important to find out if there is a combination of leukemia, or a blood disorder. This is because the typical symptom of these diseases is also sternal pain, and these patients have respiratory infections as the first symptom. It is only when a respiratory infection is detected that a hematologic disease is found. Therefore, when coughing is present and accompanied by other symptoms, it is better to have a blood test to find out the white blood cells, red blood cells and platelets to rule out some basic problems.